<?php
$year =100;


    
    
    
    

echo'<br/>';

if ($year%4!=0){
    echo "khong phai nam nhuan";
    
}
else  if ($year%400==0){
    echo "nam nhuan";} 
    
    
    else  if ($year%100==0){
        echo "nam  khong nhuan";
        
    }
    
    
    
    else {echo "nam  nhuan";
    
    
    
    }


?>
